Even if you're applying for a job in a small organization that doesn't use applicant tracking software, you may not be getting an interview because you're using a one-size-fits-all resume.
Most applicant tracking software scans for certain keywords that are the most essential to the applicant's success.
Although sharing pictures from your spring break on Instagram might have seemed like a good idea at the time, potential employers will evaluate this information to determine who you really are.
Have a trusted friend (or better yet, an HR manager) look through your resume and identify potential red flags.
If you don't follow ALL of the instructions on the application, your application will never see the light of day, no matter how qualified you are.